sweating near fiberglass tub/shower unit

[newbie]

What material should I use to protect my fiberglass tub/shower unit when sweating a new shower valve?

[master plumber mark]

If you havent figred it out for yourself already,

its best to take some sort of metal and flatten it
to put between the fttings and the fiberglass

i think its actually best to get a large Coffe can,

then flatten the can so you got a double walled heat sheild..


also a piece of drywall will work pretty well as a heat shield
if you got the room for it.

Its also not a bad idea to keep a large spray bottle Windex near by...

Windex makes a great fire extinguisher in time of need.

[captwally]

If you think you want to invest in it, a professional heat shield is a great thing. For only about $8, you get about a square foot of fiberglass wool backed by a thick foil. Unless you are using nuclear energy to sweat your pipes, it is quite good, and occasionally I supplement it with drywall as MasterMark has suggested. As a professional, I find that they last for many projects and as such are quite worth it.